diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index 47d4e814f..c80696b64 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -3984,6 +3984,9 @@ system and gives an overview of their function and contents.
 
          IMAGE_ROOTFS_EXTRA_SPACE = "41943040"
 
+   :term:`IMAGE_ROOTFS_MAXSIZE`
+       Defines the maximum size in Kbytes for the generated image.
+
    :term:`IMAGE_ROOTFS_SIZE`
       Defines the size in Kbytes for the generated image. The OpenEmbedded
       build system determines the final size for the generated image using